新型折板除雾器的流场和压降数值模拟

摘要

对引入液滴辅助捕集结构前后的折板除雾器内的流场和压降进行模拟，将两相流近似为气相流动，用SST k-ω模型模拟气相流场。在2和4 m/s的进口气速下，引入捕集结构前后，最大气速分别由7.32和14.80 m/s增至8.97和18.57 m/s，而且出现位置增多。同时高速区变大、低速区变小，2 m/s进口气速时壁面附近气速由1.5 m/s增至3.5 m/s；并发现不同气速下压降随第1级、第3级高度的变化情况相似，均与第2级差异较大，上述结论均可用于实际设计工作中。

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	刘丽艳
	赵晨光

关键词：液滴辅助捕集结构；折板除雾器；流场分布；压降

Abstract：

SST k-ω turbulence model was adopted to simulate the hydrodynamics in the wave-plate mist eliminator with or without auxiliary capture by considering the gas-liquid two-phase flow as single flow. With this model, the gas flow field and pressure drop in the wave-plate mist eliminator were obtained. Under different entrance gas speed of 2 m/s and 4 m/s, maximum gas speed increased respectively from 7.32 m/s and 14.80 m/s to 8.97 m/s and 18.57 m/s when there were auxiliary captures in the channel, and its sites also increased. At the meantime, the region of high fluid speed became larger, whereas the region of low speed became smaller. The gas speed near the wall increased from 1.5 m/s to 3.5 m/s at the entrance speed of 2 m/s. Then we discovered the change tendency of the pressure drop following the capture height at different gas speeds, and that it had similar tendency between the first stage and the third stage, meanwhile the situation was significantly different in the second stage. The conclusion above could be applied to the practical design.

Keywords： auxiliary capture； wave-plate mist eliminator； distribution of flow field； pressure drop

Received 2015-04-29;

Corresponding Authors: 刘丽艳,E-mail:liuliyan@tju.edu.cn。 Email: liuliyan@tju.edu.cn

About author: 刘丽艳(1977-),女,博士,副教授,研究方向非均相分离。

引用本文:

刘丽艳, 赵晨光.新型折板除雾器的流场和压降数值模拟[J]. 化学工业与工程, 2017,34(2): 79-83

Liu Liyan, Zhao Chenguang.Analyses of Flow Field and Pressure Drop in the Wave-Plate Mist Eliminator of New Type[J]. Chemcial Industry and Engineering, 2017,34(2): 79-83

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